Governor for explosion-engines.



L. C. FREEMAN. GOVERNOR FOR EXPLOSION ENGINES.

APPLICATION FILED MAR. 19. 1913. V

Patented Nov; 30, 1915.

IHVEHTORV WlTHESSEfi ATTORH EY TES LOWELL C. 015 DETROIT, MICHIGAN.

To all whom it may concern Be it known that I, LOWELL C. FREEMAN, acitizen of the United States, residing at Detroit, county of Wayne, State of Michigan, have invented a-certain new an'd'useful Improvement in Governors for Explosion Engines, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accom anying drawings, which form a part 0 this specification.

-My invention relates to governors for explosion engines and a special object of my improvements is to provide an improved governor to be used with such engines on automobiles, and especially on commercial vehicles. I accomplish this object in the device illustrated in the accompanying drawings in which the figure is an elevae tion partly in section of an apparatus embodying my invention, the connection with the engine being indicated.

a is an intake passage to the engine.

.b is a throttle valve adapted to control the area of the opening through the passage a. This is of a usual type.

c is the shaft upon which the valve b is secured and with which it turns to contract or enlarge the area of the passage to the engine.

(3 is a lever arm by which the shaft c is turned.

e is a connecting rod, one end of which is pivoted to the outer end of the arm d and the other end to one arm of a bell-crank lever f.

m is a shaft, pivoted in a verticalbearing and provided with a bevel gear wheel a pinned thereon.

o is a bevel gear wheel, its teeth on aging the teeth of the gear wheel a. he wheel 0 is secured rigidly upon a shaft communicating with the engine so as to have an angular velocity proportional to the speed of the engine.

g, is a grooved sleeve upon the shaft m adapted to slide lon it'udinally of said shaft. One arm of the be l-crank lever f engages in the groove of the sleeve 9 so that said bell-crank lever shall be rocked when the sleeve 9 is raised, the rocking of said lever in this direction acting through the connecting rod e and lever arm d to turn the throttle .valve b toward its closed position.

Specification of Letters Patent.

' lever arm GOVERNOR FOR EXPLOSION-ENGINES.

Patented Nov. 30, 1915.

Application filed March 19, 1913. Serial No. 755,380.

7 i, i are lever arms pivoted at their adjacent ends to the shaft m so that they shall rotate with said shaft, said lever arm being adapted to swing about their pivots in a plane through, or parallel to, the axis of the shaft m.

j, j are governor-balls upon the outer ends of the arms 6, 5 adapted to act by centrifugal force to turn said arms outward about their pivots upon the shaft m.

h, h are links pivoted to-the outer ends of the lever arms 71 i and to the sleeve g. 1

7c, is a spring acting to draw the weights 7', 3' toward each. other and to resist the centrifugal force thereof.

19, is a set-screw, the inner end of which is interposed in the path of travel of the 01 so as to limit the travel of said 81151. The set-screw p is slotted at its outer en r is a pin adapted to pass through the slot q and hold the set-screw p in an adjusted position.

The operation of the above described device is as follows: The parts are so designed that before the engine has reached the predetermined, speeihthe centrifugal force of the weights 7', 7' shall be counteracted by the spring is and the throttle valve 6 will be held in its wide open position. When the engine has reached such predetermined speed the centrifugal force of the weights 7', jovercomes the tension of the spring k and the balls fly outward drawing the lever arm d into engagement with the end of the setscrew p, in which position the throttle valve vb has reached the position be indicated in dotted lines in which the area of the opening through the passage 11 is contracted so that the speed of the engine will be thereby limited to the predetermined valuesay such speed as will drive a commercial or motor truck, under the most favorable conditions, at the rate of fifteen miles an hour. As soon as the speed falls a little below this for any cause the balls 7', .y' are at once retracted to their first position in which the throttle valve is fully open.

- It will be noticed that in: this apparatus the throttle valve is at "once closed to a predetermined extent and at once opened to its quired velocity, the area of the intake passage is at once adjusted to these conditions.

Thus the full power of the engine is exerted when it is required for driving the vehicle and for accelerating the same, and as soon as the desired speed is attained that part of the engine-power which Was required for acceleration is dispensed with, leavin the engine adapted to supply the power or driving the vehicle only. Of course the usual non-automatic controlling apparatus may cially adapted to these two conditions maybe used, that is a carbureter that will give the best mixture with a wide open passage and with the passage closed to the extent contemplated.-

What I claim is 1. The combination with a vehicle of an internal combustion engine havingan inspeed of the engine under predetermined take passage, a throttle valve adapted to be adjusted to leave said intake passage wide open or to close said passage to a degree that shall maintain a required maximum conditions, a governor apparatus directly connected to said valve to actuate the same at said engine speed, said governor apparatus being arranged so that the actuating force thereof shall always exceed the resisting force at and above said engine speed,

and means for limiting the motion of said valve toward its closed position t'oa point that shall effect the closure of the intake passage to the required degree.

2. The combination with a vehicle of an internal combustion engine having 'an intake passage, a throttle valve adapted to be adusted to leave said intake passage wide open or to-close said passage to a degree that shall maintain a required maximum speed of the engine under predetermined conditions, and a centrifugal governor apparatus having a spring, said apparatus being directly connected to said valve to actuate the same, said governor apparatus being so arranged that the centrifugal force shall always exceed the resisting force of its spring during its actuating movement.

In testimony whereof, I sign thisspecification in the presence of two witnesses.

LOWELL C. FREEMAN.

Witnesses:

AGNES M. HIPKINs, ELLIOTT J.'STODDARD. 

